图库图像在保存时会旋转
Gallery images get rotated when saved
我一直在尝试将图像保存到 Firebase Storage
,但我注意到几乎所有从 Gallery/Google 驱动器保存的图片都会旋转。(通常旋转 90 度)
阅读较早的帖子,我意识到这是一个常见问题,我尝试通过尝试此 , or from this one , this one 中的任一解决方案来解决它,我可以继续。
大约8个小时后我终于决定在这里问。 是否有更好更简单的实现来阻止图像旋转?
我最后一次使用 ExifInterface
(returns 一直为 0)的实现(显然也是不成功的)是这个:
正在选择图片
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_PICK);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
OnActivityResult
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContext().getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
cursor.close();
int rotateImageAngle = getPhotoOrientation(getContext(), selectedImage, filePath);
try {
bitmap = MediaStore.Images.Media.getBitmap(getContext().getContentResolver(), selectedImage);
// Log.d(TAG, String.valueOf(bitmap));
addPictureButton.setText("Done");
} catch (IOException e) {
e.printStackTrace();
}
if( bitmap != null)
{
RotateBitmap(bitmap , rotateImageAngle);
}
}
辅助方法
public int getPhotoOrientation(Context context, Uri imageUri, String imagePath){
int rotate = 0;
try {
context.getContentResolver().notifyChange(imageUri, null);
File imageFile = new File(imagePath);
ExifInterface exif = new ExifInterface(imageFile.getAbsolutePath());
int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_270:
rotate = 270;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
rotate = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_90:
rotate = 90;
break;
}
Log.i("RotateImage", "Exif orientation: " + orientation);
Log.i("RotateImage", "Rotate value: " + rotate);
} catch (Exception e) {
e.printStackTrace();
}
return rotate;
}
public static Bitmap RotateBitmap(Bitmap source, int angle)
{
Matrix matrix = new Matrix();
matrix.postRotate(angle);
return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true);
}
注意:如果需要,我会添加将图片上传到 Firebase 的代码
多亏了,我找到了解决方案。
我将 post 为遇到此问题的任何人提供修改后的代码工作版本。
启动图库中的图片选择
Intent intent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
intent.setType("image/*");
startActivityForResult(intent, PICK_IMAGE_REQUEST);
OnActivityResult 检查所选图片的原始旋转
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK && requestCode == PICK_IMAGE_REQUEST) {
// Get selected gallery image
Uri selectedPicture = data.getData();
// Get and resize profile image
String[] filePathColumn = {MediaStore.Images.Media.DATA};
// TRY getactvity() as well if not work
Cursor cursor = getContext().getContentResolver().query(selectedPicture, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
loadedBitmap = BitmapFactory.decodeFile(picturePath);
ExifInterface exif = null;
try {
File pictureFile = new File(picturePath);
exif = new ExifInterface(pictureFile.getAbsolutePath());
} catch (IOException e) {
e.printStackTrace();
}
int orientation = ExifInterface.ORIENTATION_NORMAL;
if (exif != null)
orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_90:
loadedBitmap = rotateBitmap(loadedBitmap, 90);
break;
case ExifInterface.ORIENTATION_ROTATE_180:
loadedBitmap = rotateBitmap(loadedBitmap, 180);
break;
case ExifInterface.ORIENTATION_ROTATE_270:
loadedBitmap = rotateBitmap(loadedBitmap, 270);
break;
}
imageView.setImageBitmap(loadedBitmap);
}
}
RotateBitmap 方法
public static Bitmap rotateBitmap(Bitmap bitmap, int degrees) {
Matrix matrix = new Matrix();
matrix.postRotate(degrees);
return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
}
我一直在尝试将图像保存到 Firebase Storage
,但我注意到几乎所有从 Gallery/Google 驱动器保存的图片都会旋转。(通常旋转 90 度)
阅读较早的帖子,我意识到这是一个常见问题,我尝试通过尝试此
大约8个小时后我终于决定在这里问。 是否有更好更简单的实现来阻止图像旋转?
我最后一次使用 ExifInterface
(returns 一直为 0)的实现(显然也是不成功的)是这个:
正在选择图片
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_PICK);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
OnActivityResult
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContext().getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
cursor.close();
int rotateImageAngle = getPhotoOrientation(getContext(), selectedImage, filePath);
try {
bitmap = MediaStore.Images.Media.getBitmap(getContext().getContentResolver(), selectedImage);
// Log.d(TAG, String.valueOf(bitmap));
addPictureButton.setText("Done");
} catch (IOException e) {
e.printStackTrace();
}
if( bitmap != null)
{
RotateBitmap(bitmap , rotateImageAngle);
}
}
辅助方法
public int getPhotoOrientation(Context context, Uri imageUri, String imagePath){
int rotate = 0;
try {
context.getContentResolver().notifyChange(imageUri, null);
File imageFile = new File(imagePath);
ExifInterface exif = new ExifInterface(imageFile.getAbsolutePath());
int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_270:
rotate = 270;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
rotate = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_90:
rotate = 90;
break;
}
Log.i("RotateImage", "Exif orientation: " + orientation);
Log.i("RotateImage", "Rotate value: " + rotate);
} catch (Exception e) {
e.printStackTrace();
}
return rotate;
}
public static Bitmap RotateBitmap(Bitmap source, int angle)
{
Matrix matrix = new Matrix();
matrix.postRotate(angle);
return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true);
}
注意:如果需要,我会添加将图片上传到 Firebase 的代码
多亏了
我将 post 为遇到此问题的任何人提供修改后的代码工作版本。
启动图库中的图片选择
Intent intent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
intent.setType("image/*");
startActivityForResult(intent, PICK_IMAGE_REQUEST);
OnActivityResult 检查所选图片的原始旋转
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK && requestCode == PICK_IMAGE_REQUEST) {
// Get selected gallery image
Uri selectedPicture = data.getData();
// Get and resize profile image
String[] filePathColumn = {MediaStore.Images.Media.DATA};
// TRY getactvity() as well if not work
Cursor cursor = getContext().getContentResolver().query(selectedPicture, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
loadedBitmap = BitmapFactory.decodeFile(picturePath);
ExifInterface exif = null;
try {
File pictureFile = new File(picturePath);
exif = new ExifInterface(pictureFile.getAbsolutePath());
} catch (IOException e) {
e.printStackTrace();
}
int orientation = ExifInterface.ORIENTATION_NORMAL;
if (exif != null)
orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_90:
loadedBitmap = rotateBitmap(loadedBitmap, 90);
break;
case ExifInterface.ORIENTATION_ROTATE_180:
loadedBitmap = rotateBitmap(loadedBitmap, 180);
break;
case ExifInterface.ORIENTATION_ROTATE_270:
loadedBitmap = rotateBitmap(loadedBitmap, 270);
break;
}
imageView.setImageBitmap(loadedBitmap);
}
}
RotateBitmap 方法
public static Bitmap rotateBitmap(Bitmap bitmap, int degrees) {
Matrix matrix = new Matrix();
matrix.postRotate(degrees);
return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
}